title: Effect of a hemodiafiltration session with on-line regeneration of the ultrafiltrate on oxidative stress. Comparative study with conventional hemodialysis with polysulfone.
abstract: BACKGROUND
  The influence of a dialysis session using hemodiafiltration with on-line regeneration of the ultrafiltrate (HFR) is compared with that of a conventional hemodialysis session with polysulfone (HD-PS) and with a group of healthy individuals.
  
  
  METHODS
  Total antioxidant capacity (TAC), antioxidants, i.e., superoxide dismutase (SOD) glutathione peroxidase (GPX), reduced glutathione (GSH) and catalase, and biomarkers of oxidative stress were evaluated in plasma, whole blood and lymphocytes.
  
  
  RESULTS
  The study showed decreased plasma TAC, decreased activities of antioxidant enzymes and decreased GSH levels along with increased thiobarbituric-acid-reactive substances and 8-hydroxy-2-deoxyguanosine (8-OHdG) levels in lymphocytes. The antioxidants and biomarkers of lipid and protein damage after dialysis sessions with HFR were similar or better than following HD-PS. Thus, the blood GPX activity was comparable to that of healthy controls and significantly better than following HD-PS. An increase in 8-OHdG levels was observed in the HD-PS group after dialysis but not in the HFR group.
  
  
  CONCLUSIONS
  These results show that HFR induces less oxidative stress than HD-PS.
authors.affiliation: Sección de Nefrología,, Hospital General Yagüe, Burgos, Spain. basilia@hgy.es
authors.forename: B
authors.initials: B
authors.lastname: González-Diez
authors.forename: M
authors.initials: M
authors.lastname: Cavia
authors.forename: G
authors.initials: G
authors.lastname: Torres
authors.forename: P
authors.initials: P
authors.lastname: Abaigar
authors.forename: P
authors.initials: P
authors.lastname: Muñiz
mesh_terms: D000080242:8-Hydroxy-2'-Deoxyguanosine; D000328:Adult; D000368:Aged; D000975:Antioxidants / Q000032:analysis; D015415:Biomarkers / Q000032:analysis / Q000097:blood; D003849:Deoxyguanosine / Q000031:analogs & derivatives / Q000032:analysis; D005979:Glutathione Peroxidase / Q000032:analysis; D017583:Hemodiafiltration / Q000009:adverse effects / Q000379:methods*; D006801:Humans; D008214:Lymphocytes / Q000737:chemistry; D008875:Middle Aged; D009862:Online Systems; D018384:Oxidative Stress; D011108:Polymers; D013450:Sulfones; D017392:Thiobarbituric Acid Reactive Substances / Q000032:analysis
chemical_list: D000975:Antioxidants; D015415:Biomarkers; D011108:Polymers; D013450:Sulfones; D017392:Thiobarbituric Acid Reactive Substances; C017662:polysulfone P 1700; D000080242:8-Hydroxy-2'-Deoxyguanosine; D005979:Glutathione Peroxidase; D003849:Deoxyguanosine